Metal-drawing machine.



"'No. 646,936. I Pat'ented Apr. I0, |900;l

w. a. ALGEo, JR. METAL DRAWING MAGHINE.

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No. 646,936. 6 Patented Apr. lo, |900i w. 6. Amen, 1n.

METAL DRAWING MAGHINE.

(Application 1961 Iune` 15, 1899.)

(No Model.)

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WUNTTEED STATES PATENT @Error-t.

WILLIAM GIBSON ALGEO, JR., OF BEAVER FALLS, PENNSYLVANIA.

|VlETALDRAWl-NG MACHINE.

SECIFIICATION forming pai-t of Letters` :Patent No. 646,936, dated April 10, 1900. Application filed J' une 15, 1899. Serial No. 720,598. (No model.)

` this specification.

The invention relates particularly to machines for drawing metal in great lengths as ycompared with present practice in respect to drawing rods and other straight bodies.

The embodiment of the invention illustrated in the'drawings is designed to draw twenty-live feet at one pull, after which the pulling-gripper may be set back to draw a second twenty-five feet.

The object of the invention is to improve drawing-machines, making them more efficient, more readily handled, more durable, and better in every way, and while the improvements are specially adaptable to drawing straight bodies in long lengths the invention is not of course limited to such use.

The novel features will be best understood by a description of the accompanying drawings, which illustrate a preferred form of the invention.

Figure 1 is a side elevation of the appara,- tus. Fig. 2 is a cross-section of the pushingplunger and gripper. Fig. 3 is an end view of the same looking from the forward end. Fig. 4 is a vertical central section through the pulling-cylinder, (to. Fig. 5 is an end View of the-die-head. Fig. 6 is a View of the pulling-cylinder head which is toward the diehead. Fig. 7 is a plan view of the draw-head and drawing-gripper. Fig. 8 `is a side elevation of the same. Fig. 9 is an end view of the same, showing also the roller-supports and brace-rods of the machine; and Fig. 10 is a plan view of a brace for the drawing-yoke.

Throughout the drawings like numerals of reference indicate like parts.

The machine embodies a pushing-cylinder, which has a hollow plunger and gripping mechanism, `with a short stroke as compared with the pulling-cylinder; also, a pulling-cylinder, which has a hollow plunger and hollow piston-rod or drawing-rod connected to the drawing-head; also, tie-rods or brace-rods which connect the two cylinders together and a die-head which is secured to the bracerod. Preferably the pulling and pushing cylinders are powerful single-actingcylinders, and four (or two) cylinders of small diameter are employed for retracting the plungers and gri ppers to their initial position. The metal to be drawn is 4introduced axially through the hollow plunger of the pushing-cylinder, gripped in the gripper, and then forced forward by the cylinder until the end of the metal is protruded through the die far enough to enable the pulling-gripper to take hold. The metal is then drawn by the pulling-gripper progressivelyin successive steps, thegripper being released and set back when it 'reaches the limit of movement of the pullving-cylinder andgripped onto the metal again farther back, near the die-head. When the pulling-gripper isset back with the hollow piston or plunger of the pulling-cylinder, the metal that has already been drawn runs through the open center of the pulling-plunger or pulling-piston and protrudes at the end, where it may be suitablysupported and guided to prevent its bending.

Considering now each ofthe mechanisms of the machine illustrated in the drawings, the pushing-cylinder is indicated by 10, the pulling-cylinder by 20, the drawing-head by 30,

andthe die-head by 40. The pushing-cylinder isa relatively short strong cylinder in which the pushing-plunger, preferably of the form shown in Fig.2, is fitted. The larger portion of the plunger 11 projects through the end of 'the cylinder toward the die-head 40 andis surrounded by the packing-box 12. Through the other end of the cylinder and surrounded by the packing-box 13 the tubular projection 14 of the plunger extends and is secured to the cross-head 15, which is actuated by the plungers 16 of the retracting-cylinders 17. The large cylinder 10 is used to force the pushing-plunger 11 toward the die-head, Fig. 1, while the small cylinders 17, operating with less power andat a higher speed, retract the plunger from the die-head. The grippers or gripping-jaws of the pushing-cylinder may be preferably of the type shown, which is a type common in testing-machines, and they are mounted in the casting 18 on the end of the ram or plunger 11, as shown in Fig. 2. A

IOO

strap 19, preferably placed around the casting 1S, reinforces the latter against the strain produced by the wedge-like form of the gripper`when the plunger is forced forward. As will be seen by Figs. 2 and 3, the metal billet or bar to be drawn may be introduced axially through the central opening in the plunger and gripped near its forward ends between the jaws of the gripper. This central opening is of course in line with the die-opening in the die-head 40. The die-head 40 is bolted to the tie-rods or brace-rods 41, which are secured at each end to the cylinders 10 and 20. The details of the die-head are shown in Fig. 5.

The pulling-cylinder 20 may consist of several lengths of cylindrical casing, bolted together and provided with acylinder-head and packing-box 22, surrounding the hollow plunger 21. At the other end the cylinder-head 23 is provided with a smaller packing-box 24, which surrounds the tubular piston-rod or plunger-rod 25, which connects the plunger 21 to the draw-head 30. This rod 25 carries a cross-head 26, connected with plungers 27 of the small retracting-cylinders 28, which areadapted to force the draw-head Orapidly tothe left, Fig. 1, to return it toward thediehead to its initial position when it has mad-e itsstroke tothe right. The projecting end ofthe hollow plunger 21 is preferably provided with friction-reducing supports-such, forinstance, as one or more rollers 2i). This provision is especially important 'Where the length of the plunger 21 is from twenty-'five to thirty feet or more.

In order to allow for some eccentricity of the end of the metal as itis iirst thrust through the die ready to be gripped by the pullinggripper, the pulling-gripper has a sliding adjustment in a yoke upon the end of the rod 25, which yoke'50 is supported upon a pair of rollers or wheels 51, which run upon the tierods or brace-rods 41. These details are shown in Figs. 7, 8, 9, and 10. This yoke 50 is bolted directly onto the end of the pulling-rod 25 and is provided with` cross braces o'r yokes 52 53, secured to the studs 54, as shown in Figs. 7, 8, and i). The yoke 52 has an elongatedcentral opening 56, through which the grip-operating shaft extends, the yform of the opening allowing the movement of the gripper laterally without interference from the brace 52. The gripper, which may be of a typefalready mentioned, is carried in a sliding head GO, which has two tongues or slides 61, that t and move freely within slots G2 in the yoke 50, permitting both horizontal and vertical adjustment. The horizontal adjustment is effected by means of a vertical shaft G4, which runs through theopening 65 in the cross-brace 52 and is provided with an eccentric-pin 66,

which runs in the slot 67 of the cross-head 60. Turning the shaft 64 will result, therefore, in shiftingthe cross-head 60 laterally. Verticaliy the adjustment is effected by a nut 70, screw-threaded onto the screw-stud 71 of the cross-head GO and resting upon the brace 52.

By adjusting the nut the level of the gripper may be accurately adjusted, and then the gripper may be set toward the right or the left by means of the adjusting-shaft 64 previously to being gripped onto the end of the metal to be drawn.

The operation of the'machine will now be understood from the description of the several parts and their cooperation and objects, as already set forth. It will of course be understood that the pistons may be used as equivalents of plun gers, though it is less practical to accurately bore out the cylinder to receive the piston and to provide the piston with packing than to true up the cylindrical exterior of the plunger and provide a packing-box in thehead of the cylinder. So, also, other obvious equivalents will readily suggest themselves, and I will not attempt to die-head, a gripper for the metal, and a cyl-.

inder, plunger or piston, and rod, for relatively moving the gripper and die-head, the

-said rod fitting one end or head of the cylinder and the said plunger or piston also tting the cylinder, and there being an axial opening through the plunger orpiston and the rod from end to end, substantially as set forth.

2. In combination in a drawing-machine, a die-head, a pulling-gripper, a cylinder, a tubular plunger or piston packed in said cylinder,atubular rodrunnin g through and packed in the head of the cylinder and connected to the gripper, a pushing-gripper in line with the said die-head, a pushing-cylinder, a tubular plunger or piston therefor connected to said gripper, and a rearwardly-extending tubular projection from the said plunger or piston packed in the rear end of the said cylinder, substantially as set forth.

8. In combination in a drawing-machine, and with the pulling-gripper thereof, a cylinder, a tubular plunger running through and packed in one head of the said cylinder, and a tubular rod running through and packed in the other head of the cylinder and connected with the gripper, substantially as set forth.

4. In combination in a drawing-machine, and with the pulling-gripper thereof, a cylinder, a tubular plunger running through and Vpacked in one head of the said cylinder, and

a tubular rod running through and packed in theother head of the cylinder and connected with the gripper, and friction-reducingv supports for the projecting end of the said plunger, su bstantially as set forth.

5. In combination in a drawing-machine, a

gripper, a cylinder, a piston or plunger, and rod, connected to actuate the gripper, a movable connecting devicebetween the gripper and the said rod allowing lateral and vertical IOO adjustment of the gripper, and positive means for so adjusting the gripper vertically, substantially as set forth.

6. In combination in a drawing-machine, a gripper, a cylinder, a piston 'or plunger, and rod, connected to actuate the gripper, and a movable connecting device between the gripper and the said rod allowing lateral and vertical adjustment of the gripper, the said connecting device combining a slotted yoke and a cross-piece sliding in the said slotted yoke, substantially as set forth.

7. In combination in a drawing-machine, a gripper, a cylinder, a piston or plunger, and rod, connected to actuate the gripper, and a movable connecting device between the gripper and the said rod allowing lateral and vertical adjustment of the gripper, the said connecting device combining a yoke secured to the said rod and provided with supporting guiderollers,`and a cross-piece carrying the said gripper, and sliding transversely in the said yoke, substantially as set forth.

.8. In combination in a drawing-machine, and with the pushing-gripper thereof, a cylinder, a tubular plunger running through and packed in one head of the cylinder and carrying the said gripper on its projecting portion, and a tubular continuation of the said plunger of smaller diameter running through and packed in the other head of said cylinder, substantially as set forth.

9. In a drawing-machine, a pushing-cylinder set in line with the draw-die, a hollow piston or plunger therefor carrying a gripper at 3 5 one end and having a tubular projection at the other end extending through and packed in the head of said cylinder, whereby the metal may be introduced axially through the said plunger or piston, and one or more re- 4o tra-@ting cylinders and plungers or pistons,` connected to the said tubular projection, substantially as set forth.

. l0. In combination in a drawing-machine, a pulling cylinder and piston or plunger, a 45 pushing cylinder and piston or plunger, bracerods connecting the said cylinders, a die-head secured to the said brace-rods between the said cylinders, and a gripper connected to be actuated by the said pulling-cylinder, the said 5o pistons or plun gers being tubular and affording an uninterrupted axial opening from 011e end of the machine to the other,'substantially as set forth.

Signed this 9th day of June, 1899, at Beaver 55 Falls, Pennsylvania.

WILLIAM GIBSON ALGEO, JR. Witnesses: i

FREDERICK N. PEEGLE, J AMES A. MGMAHON. 

